Reminiscing about old transistors in another thread reminds me of something that's been nagging at me on and off for some time.
In the early days of solid-state audio amplifiers - mostly PA types - here in India, there was a *very* limited choice of power transistors. Most amps used the European Ge TO-3 type AD149. Types like the 2N3055 and 2N3773 came long after they were widely used in the West.
In between those two 'eras', there was another type that was fairly popular for some time, but I've never been able to recall the number. All I know is that it was Ge PNP in a TO-3 case, JEDEC number (2Nxxxx), 5A Ic max and good gain. I /think/ the type number included a 5 and a 2 or 4, but I could be wrong about that.
Does anyone have any idea what it might be?